碳纤维编织网增强磷酸镁水泥砂浆界面黏结性能研究  

Interfacial Bonding Performance of Carbon Fiber Textile Reinforced Magnesium Phosphate Cement Mortar

作　　者：张汉振 李伟[1,2] 谢剑[1,3] 佟成龙[4] Zhang Hanzhen;Li Wei;Xie Jian;Tong Chenglong(School of Civil Engineering,Tianjin University,Tianjin 300350,China;School of Civil Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;Beijing Engineering Research Center of Existing Building Renovation(Tianjin Branch),Tianjin 300350,China;The 3rd Construction Co.Ltd.of China Construction 5th Engineering Bureau,Tianjin 300300,China)

机构地区：[1]天津大学建筑工程学院,天津300350 [2]兰州交通大学土木工程学院,甘肃兰州730070 [3]北京市既有建筑改造工程技术研究中心(天津分中心),天津300350 [4]中建五局第三建设有限公司,天津300300

出　　处：《石家庄铁道大学学报（自然科学版）》2023年第2期42-48,共7页Journal of Shijiazhuang Tiedao University(Natural Science Edition)

基　　金：国家自然科学基金(52068043);甘肃省建设科技攻关项目(JKR2021-07)。

摘　　要：为研究碳纤维编织网增强磷酸镁水泥砂浆加固法(TRMM)中2个界面(砂浆-混凝土、碳纤维编织网-砂浆)的黏结性能,对21个黏结试件进行了弯折试验。研究变量包括界面处理方式(打磨、刻槽、凿毛)、磷酸镁水泥砂浆(MPCM)类型(MPCM、聚乙烯醇纤维(PVA)改性MPCM)、碳纤维编织网处理方式(表面涂层、表面涂层+粘砂、浸渍+粘砂),分析了试件破坏模式和在不同变量下黏结性能变化规律。结果表明,砂浆-混凝土界面黏结性能随着界面粗糙度的提高而增强,当粗糙度由0.77 mm提高至1.97 mm,试件由脆性破坏变为延性破坏;PVA可通过桥联作用改善碳纤维编织网-砂浆界面黏结性能;浸渍和粘砂后碳纤维编织网-砂浆界面黏结性能显著增强,界面黏结强度提高68%。To investigate the bonding performance of two interfaces(mortar-concrete and textile-mortar)in the strengthening method of carbon fiber textile reinforced magnesium phosphate cement mortar(TRMM),bending tests of 21 bonding specimens were carried out.The tests were conducted considering some parameters,e.g.,the treatments of interface(polished,grooved,chiseled),the types of magnesium phosphate cement mortar(MPCM,PVA-modified MPCM),and the treatments of textile(coated,coated and sand-sticked,impregnated and sand-sticked).Then the failure modes and bonding performance under different variables were compared and analyzed.The results show that the interfacial bonding performance between MPCM and concrete enhances with the improvement of interface roughness.When the roughness increases from 0.77 mm to 1.97 mm,the failure modes are changed from brittle failure to ductile failure.PVA can improve the interfacial bonding performance between textile and MPCM through bridging effect.After being impregnated and sand-sticked,the bonding performance between textile and MPCM enhances significantly,and the bonding strength increases by 68%.

关 键 词：磷酸镁水泥砂浆 碳纤维编织网 界面处理方式 界面黏结 加固修复 

分 类 号：TU58[建筑科学—建筑技术科学]